20820642

素因数分解:

$2^1\times 3^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1\times {\mathrm{349}}^1$

素因数の和:578

約数の個数: 32

約数和(自身を含む): 42705600

約数和(自身を除く): 21884958

約数列:

[1, 2, 3, 6, 61, 122, 163, 183, 326, 349, 366, 489, 698, 978, 1047, 2094, 9943, 19886, 21289, 29829, 42578, 56887, 59658, 63867, 113774, 127734, 170661, 341322, 3470107, 6940214, 10410321, 20820642]

約数ペア:

[(1, 20820642), (2, 10410321), (3, 6940214), (6, 3470107), (61, 341322), (122, 170661), (163, 127734), (183, 113774), (326, 63867), (349, 59658), (366, 56887), (489, 42578), (698, 29829), (978, 21289), (1047, 19886), (2094, 9943)]